# Compatify Compatibility Check

> Compatify Compatibility Check is a paid API for AI agents from api.compatify.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Checks compatibility between two or more items, entities, or configurations and returns a compatibility assessment

## Facts

- Endpoint: POST https://api.compatify.io/v1/compatibility
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-compatify-io-a94ec323
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XqOu2syG68uRaKPKWCfvC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-compatify-io-a94ec323 -d '<json body>'
```

Example prompt: Can you check if React 18 is compatible with Node 16 using Compatify? I want to know if they work together before I upgrade.

## When to prefer this

Use this endpoint when you need a quick programmatic compatibility check between two or more items — such as software versions, libraries, configurations, or other paired entities — and want a structured pass/fail or scored result rather than a manual lookup.

## Known failure modes

- Missing required entity inputs returns 400 error
- Unrecognized entity types or identifiers return 422 error
- Payment not received or insufficient funds returns 402 Payment Required
- Rate limit exceeded returns 429 error
- Internal processing error returns 500

## How this service works

Compatify compatibility check

## Output

A compatibility assessment indicating whether the two or more entities are compatible, potentially including a compatibility score, status flag, and details about any conflicts or issues found.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-compatify-io-a94ec323/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.compatify.io](https://www.zero.xyz/host/api.compatify.io/llms.txt)